/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.cdc.udf.examples.scala

import org.apache.flink.cdc.common.udf.UserDefinedFunction

/** This is an example UDF class for testing purposes only. */
class LifecycleFunctionClass extends UserDefinedFunction {
  private var counter: Integer = 0

  def eval: String = {
    "#" + {
      counter += 1; counter - 1
    }
  }

  override def open(): Unit = {
    counter = 0
    System.out.println("[ LifecycleFunction ] opened.")
  }

  override def close(): Unit = {
    System.out.println("[ LifecycleFunction ] closed. Called " + counter + " times.")
  }
}
